7 The most deeply impressive of these prophetic utterances is surely that warning of Joel which is constantly ringing in our ears in the course of the Lenten liturgy: "Now therefore, says the Lord, Be converted to me with all your heart, in fasting and in weeping and in mourning. And rend your hearts and not your garments... Between the porch and the altar the priests, the Lord's ministers, shall weep and say: Spare, O Lord, spare thy people, and give not thy inheritance to reproach, that the heathen should rule over them."(6)
Source: Paenitentiam Agere (Vatican.va)